The Seiko VD51 SII quartz chronograph watch movement is a 12¾ ligne caliber measuring 29.50 × 26.00 mm with a thickness of 4.50 mm and total height of 6.93 mm. It features central hour minute and sweep seconds hands plus a 60 minute register at 6 o’clock and small seconds at 12 o’clock along with a date window at 3 o’clock. This 0 jewel movement runs on a 371 battery uses stem part number 351 177 and has hand sizes 110/65/20 with 0.21 mm indicator hands.